I got my Food Vac at Costco a couple years ago, use it often, and it still works great. The Costco deal usually comes with food seal bags/material so you don't have to worry about buying that initially. It's very easy to use.
Also, good choice on the Excalibur. I have the 9 tray version without timer. Use it all the time. Love it! And I don't have the problems I did with my other dehydrator in terms of uneven dehydration. I put items in, go out, come back and get another batch going. No problems at all with letting it run while gone.